Mantle sources of Cenozoic volcanoes around the South China Sea revealed by geochemical and isotopic data using the principal component analysis

作     者：Shuangshuang CHEN Zewei WANG Rui GAO Yongzhang ZHOU Shuangshuang CHEN;Zewei WANG;Rui GAO;Yongzhang ZHOU

作者机构：School of Earth Sciences and EngineeringSun Yat-sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519080China Guangdong Provincial Key Lab of Geological Processes and Mineral ResourcesGuangzhou 510275China State Key Laboratory of Marine Environmental ScienceXiamen UniversityXiamen 361102China Department of Earth and Space SciencesSouthern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Tibetan Plateau Earth SystemEnvironment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China 

出 版 物：《Journal of Oceanology and Limnology》 (海洋湖沼学报（英文）)

年 卷 期：2023年第41卷第2期

页      面：562-574页

核心收录：

学科分类：0710[理学-生物学] 070704[理学-海洋地质] 07[理学] 0707[理学-海洋科学] 

基　　金：Supported by the State Key Laboratory of Marine Environmental Science Visiting Fellowship(No.MELRS2233) the State Key Laboratory of Marine Geology,Tongji University(No.MGK202302) the Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)(No.311021003) the Zhujiang Talent Project Foundation of Guangdong Province(No.2017ZT07Z066) the Fundamental Research Funds for the Central Universities,Sun Yat-sen University(Nos.22qntd2101,2021qntd23) the Major Projects of the National Natural Science Foundation of China(Nos.41790465,41590863) the National Natural Science Foundation of China(Nos.42102333,41806077,41904045)。 

主　　题：volcanic rocks geochemical indicators mantle source principal component analysis South China Sea 

摘      要：Principal component analysis(PCA)was employed to determine the implications of geochemical and isotopic data from Cenozoic volcanic activities in the Southeast Asian region,including China(South China Sea(SCS),Hainan Island,Fujian-Zhejiang coast,Taiwan Island),and parts of Vietnam and Thailand.We analyzed 15 trace element indicators and 5 isotopic indicators for 623 volcanic rock samples collected from the study region.Two principal components(PCs)were extracted by PCA based on the trace elements and Sr-Nd-Pb isotopic ratios,which probably indicate an enriched oceanic island basalt-type mantle plume and a depleted mid-ocean ridge basalt-type spreading ridge.The results show that the influence of the Hainan mantle plume on younger volcanic activities(13 Ma)at the same location in the Southeast Asian region.PCA was employed to verify the mantle-plume-ridge interaction model of volcanic activities beneath the expansion center of SCS and refute the hypothesis that the tension of SCS is triggered by the Hainan plume.This study reveals the efficiency and applicability of PCA in discussing mantle sources of volcanic activities;thus,PCA is a suitable research method for analyzing geochemical data.